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2.
TCNMARS TM-203
DESCRIPTION
Measures light from visible luminaries equipped
with fluorescent, metal halide, high-pressure
sodium and incandescent sources.
SAFETY PRECAUTION
ake extreme care for the following
while measuri
Do not operate the meter under the environment
with explosive gas (material), combustible gas
(material) steam or filled with dust.
ln order to avoid reading incorrect data, please
replace the battery immediately when the symbol
"lEt'appears on the LCD.
ln order to avoid the damage caused by
coniamination or static electricity, do not touch the
circuit board before you take any adequate action.
Operating Environment: lndoors use. This
instrument has been designed for being used in an
environment of pollution degree 2.
Operation Altitude: Up to 2000M.
Operating Temperature & Humidity: -10 C - 50'C ,
0%- B0%RH.
Storage Temperature & Humidity: -10 C - 50 C ,
0%-70%RH.
EMC:EN61 326(1 997)+41 11 998)+A2(2001 )
T€NMAIi5 TM-203
3. PREFACE
The flux of light received in a unit area of a ceriain
side being shone is popularly known as illumination.
ln both United Kingdom and America its unit is
known as footcandles light, but in Europe it is
known as meter candlelight.
One foot-candles light is the illumination of light that
falls on one side that lies in a distance one foot
away from a one footcandlelight and exactly
iniersecting the light. lts abbreviated form is written
as 1 Fc=1 Lm/ft, similarly, one-meter candlelight is
the illumination of light that falls on a side that lies in
a distance one meter away from a one meter
candlelight and exactly intersects the light. lt is also
called Lux i,e. the flux of light being received in
each sq. meter is called the illumination of one
lumen.
As one foot candle=10.764 Lux, therefore,Nbr. of
foot (meter) candlelight =
Nbr. of Lumen
Area(sq. foot or sq. meter)
Nbr. of Lumen=Nbr. of foot (or meter)x area
Foot-candle/Lux conversion
1 footcandle=10.764 lux
1 lux=0.09290 foot-candles
(sq, foot or sq. meter)
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